.monitor-system {
  height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: #f5f7fa;
}

.header {
  background-color: #409eff;
  color: white;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header h1 {
  margin: 0;
  font-size: 20px;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 15px;
}

.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.monitor-section {
  flex: 1;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.info-section {
  width: 55%;
  padding: 20px;
  background-color: white;
  border-left: 1px solid #ebeef5;
  overflow-y: auto;
}

.video-container {
  background-color: white;
  padding: 15px;
  border-radius: 4px;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
}

.video-container h2 {
  margin-top: 0;
  margin-bottom: 15px;
  font-size: 16px;
  color: #333;
}

.live-video {
  width: 100%;
  max-height: 250px;
  background-color: #000;
  border-radius: 4px;
}

.video-controls {
  margin-top: 10px;
  text-align: center;
}

.alarm-section {
  background-color: white;
  padding: 15px;
  border-radius: 4px;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
}

.alarm-section h2 {
  margin-top: 0;
  margin-bottom: 15px;
  font-size: 16px;
  color: #333;
}

.no-alarms {
  text-align: center;
  color: #999;
  padding: 20px;
}

.alarm-item {
  padding: 10px;
  margin-bottom: 8px;
  border-left: 4px solid;
  display: flex;
  align-items: center;
  gap: 10px;
}

.alarm-high {
  border-left-color: #f56c6c;
  background-color: #fef0f0;
}

.alarm-medium {
  border-left-color: #e6a23c;
  background-color: #fdf6ec;
}

.alarm-low {
  border-left-color: #409eff;
  background-color: #ecf5ff;
}

.alarm-time {
  font-size: 12px;
  color: #666;
  min-width: 80px;
}

.alarm-content {
  flex: 1;
  font-size: 14px;
}

.alarm-action {
  flex-shrink: 0;
}

.filter-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
  align-items: center;
}

.student-selector {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.report-loading {
  text-align: center;
  padding: 40px 0;
  color: #666;
}

.report-loading .el-icon {
  margin-right: 10px;
}

.report-container {
  background-color: white;
  padding: 20px;
  border-radius: 4px;
}

.report-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}

.report-header h3 {
  margin: 0;
}

.report-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #666;
  font-size: 14px;
}

.report-content h4 {
  margin-top: 20px;
  margin-bottom: 10px;
  color: #333;
}

.report-content p {
  line-height: 1.6;
  color: #666;
}

.report-chart {
  margin: 15px 0;
}